#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Projection_traits_xy_3.h>
#include <CGAL/Delaunay_triangulation_2.h>
#include <fstream>
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef CGAL::Projection_traits_xy_3<K>  Gt;
typedef CGAL::Delaunay_triangulation_2<Gt> Delaunay;
typedef K::Point_3   Point;

int main()
{
	std::ifstream in("E:/Temp/cgal_data/data/terrain.cin");
	std::istream_iterator<Point> begin(in);
	std::istream_iterator<Point> end;
	Delaunay dt(begin, end);
	std::cout << dt.number_of_vertices() << std::endl;
	return 0;
}
